Ma Zongpeng, Solís-Fernández Pablo, Hirata Kaito, Lin Yung-Chang, Shinokita Keisuke, Maruyama Mina, Honda Kota, Kato Tatsuki, Uchida Aika, Ogura Hiroto, Otsuka Tomohiro, Hara Masahiro, Matsuda Kazunari, Suenaga Kazu, Okada Susumu, Kato Toshiaki, Takahashi Yasufumi, Ago Hiroki
Interdisciplinary Graduate School of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan.
Faculty of Engineering Sciences, Kyushu University, Fukuoka 816-8580, Japan.
Sci Adv. 2025 Jan 10;11(2):eadr8046. doi: 10.1126/sciadv.adr8046. Epub 2025 Jan 8.
Transition metal dichalcogenides (TMDs) exhibit unique properties and potential applications when reduced to one-dimensional (1D) nanoribbons (NRs), owing to quantum confinement and high edge densities. However, effective growth methods for self-aligned TMD NRs are still lacking. We demonstrate a versatile approach for lattice-guided growth of dense, aligned MoS NR arrays via chemical vapor deposition (CVD) on anisotropic sapphire substrates, without tailored surface steps. This method enables the synthesis of NRs with widths below 10 nanometers and longitudinal axis parallel to the zigzag direction, being also extensible to the growth of WS NRs and MoS-WS heteronanoribbons. Growth is influenced by both substrate and CVD temperature, indicating the role of anisotropic precursor diffusion and substrate interaction. The 1D nature of the NRs was asserted by the observation of Coulomb blockade at low temperatures. Pronounced catalytic activity was observed at the edges of the NRs, indicating their promise for efficient catalysis.
过渡金属二硫属化物（TMDs）在被还原为一维（1D）纳米带（NRs）时，由于量子限制和高边缘密度而展现出独特的性质和潜在应用。然而，仍缺乏用于自对准TMD NRs的有效生长方法。我们展示了一种通用方法，通过在各向异性蓝宝石衬底上进行化学气相沉积（CVD），在没有定制表面台阶的情况下，实现晶格引导生长致密、排列整齐的MoS NR阵列。该方法能够合成宽度低于10纳米且纵轴平行于锯齿方向的NRs，并且还可扩展到WS NRs和MoS-WS异质纳米带的生长。生长受到衬底和CVD温度的影响，这表明了各向异性前驱体扩散和衬底相互作用的作用。通过在低温下观察到库仑阻塞，证实了NRs的一维性质。在NRs的边缘观察到显著的催化活性，表明它们在高效催化方面具有潜力。
